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 A253611 Number of (n+2)X(1+2) 0..2 arrays with every consecutive three elements in every row and diagonal having one or two distinct values, and in every column and antidiagonal having two or three distinct values, and new values 0 upwards introduced in row major order 1
 762, 8664, 97232, 1100582, 12433311, 140520343, 1587933587, 17945023519, 202792213952, 2291710610115, 25898101189643, 292668628900524, 3307382282978585, 37375983213265800, 422377576820935092 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 1 of A253615 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 9*a(n-1) +45*a(n-2) -184*a(n-3) -458*a(n-4) +1161*a(n-5) +1148*a(n-6) -1369*a(n-7) +3794*a(n-8) -2764*a(n-9) -55923*a(n-10) +7449*a(n-11) +208853*a(n-12) -98842*a(n-13) -23515*a(n-14) -853218*a(n-15) +1405774*a(n-16) -204020*a(n-17) -793726*a(n-18) +2392307*a(n-19) -3658864*a(n-20) +612572*a(n-21) +461558*a(n-22) -1884359*a(n-23) +3941388*a(n-24) +1134857*a(n-25) -2874383*a(n-26) +204350*a(n-27) +666534*a(n-28) -42988*a(n-29) -191134*a(n-30) -89650*a(n-31) +7276*a(n-32) -21568*a(n-33) +8124*a(n-34) -12728*a(n-35) -4896*a(n-36) -320*a(n-37) -512*a(n-38) EXAMPLE Some solutions for n=3 ..0..1..0....0..1..1....0..0..0....0..1..1....0..1..0....0..0..1....0..1..0 ..2..0..0....2..0..0....1..0..0....1..0..0....2..2..0....0..0..2....1..2..1 ..2..2..2....1..2..1....1..1..2....2..1..1....1..2..2....2..2..2....1..1..0 ..0..0..1....0..0..2....0..2..0....0..2..0....1..1..1....0..1..0....0..1..1 ..2..1..2....0..1..1....1..0..1....0..0..2....0..1..0....1..2..1....1..0..0 CROSSREFS Sequence in context: A061225 A253615 A253616 * A326369 A210081 A083645 Adjacent sequences:  A253608 A253609 A253610 * A253612 A253613 A253614 KEYWORD nonn AUTHOR R. H. Hardin, Jan 05 2015 STATUS approved

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Last modified December 14 14:50 EST 2019. Contains 329979 sequences. (Running on oeis4.)